Drinking water safety: municipality of Würenlos as a pioneer
With the area-wide use of the STOPR backflow preventer, Würenlos in the canton of Aargau is the first municipality in Switzerland to implement a new standard in water safety. An innovative flap technology with integrated venting in the Storz prevents contaminated water from flowing back into the drinking water supply. The cost-effective system also features high flow rates is easy to install.
The system for backflow prevention called STOPR was developed by vonRoll hydro. The "godfather" for this development was the function of the human heart valve: best flow values and reliable closure are decisive for the efficiency of the heart. The situation is similar with hydrants: they must be able to draw water quickly in large quantities, and at the same time they must protect the water network against contamination through backflow. The spring-loaded check valve of the STOPR is mounted in the so-called Storz and reliably closes the hydrant from a pressure of 0.003 bar, which corresponds to the force of a water column of only 3 cm. In order to ensure that water can be drawn without interference, the STOPR has been flow-optimized by vonRoll hydro engineers. Where previous systems cause flow losses of up to 40%, the system results in no significant impairment of hydrant performance.
Easy mounting and permanent protection
Today, the safety of drinking water supplies is more important than ever. Accordingly, vonRoll hydro relies on permanent solutions for water safety technologies. The STOPR is permanently installed, which can be done in the simplest way on hydrants from all manufacturers, even retrofitted. Thanks to a patented venting system in the system itself, no modification of hydrants is required. By simply changing the Storz, any water supply can inexpensively implement a new standard of drinking water safety.
Pioneering role of the water supply Würenlos
Felix Zürcher, well master of Würenlos (AG), emphasizes the importance of reliable protection of drinking water: "The municipality of Würenlos is proud to have realized the first reference project with the new technology in Switzerland. This reliable and permanent protection of drinking water will set an example at home and abroad," he is convinced. Jürg Brand, Chairman of the Board of Directors of the vonRoll hydro Group, comments: "Water has become the fundamental strategic issue par excellence. With the mission statement ZEROWATERLOSS, we are directing our commitment towards the Water and water supply safety. The new STOPR performs an important function in this regard and, after Switzerland, will also be delivered in Europe and worldwide."
Source and further information: FromRoll hydro / Community Würenlos
